Triangles
What do you call a triangle with all sides the same length?
An equilateral triangle
What is the definition of a quadrilateral?
A polygon with 4 sides and 4 angles.
What is a line?
A line has to arrows going in both directions.
What is a line of symmetry?
A line of symmetry is where you fold on the line and both halves will match up exactly.
Name the shapes...
Opposite sides are parallel and all sides are equal in length
Rhombus and Square
What do you call a triangle that has 3 acute angles?
An acute triangle
Name all the quadrilaterals that have 4 right angles.
A square and a rectangle
What is a line segment?
A line segment has two end points.
How many lines of symmetry does a rectangle have?
two
Name the shapes...
Opposite sides are parallel and equal in length.
Rectangle & Parallelogram
What is a scalene triangle?
A triangle where all three sides are different lengths.
If a quadrilateral only has one set of parallel lines it is called......?
A trapezoid
What is a ray?
A ray has one end point and a line (arrow) going in one direction.
How many lines of symmetry does an equilateral triangle have?
three
True or False
All rhombuses are parallelograms?
True
What is an isosceles triangle?
A triangle where only two sides are equal in length.
What is the definition of a parallelogram?
A quadrilateral with TWO sets of parallel lines.
What are perpendicular lines?
Lines that cross or intersect to form 90 degree angles.
Which letters do not have a line of symmetry?
Y N W R A L F D
N, R, L, & F
True or False
All rectangles are squares.
False
What do you call a triangle with a 90 degree angle?
A right triangle
Name all the parallelograms.
Square, rhombus, rectangle, & parallelogram
What are parallel lines?
Two lines that will never meet/intersect because they are the same distance apart their entire length.
What shape has an infinite number of lines of symmetry?
A circle
All rhombuses are squares.
False